Novak Djokovic survived another stern test at the Australian Open as he sealed a 7-6, 4-6, 6-2, 6-3 win over 12th-seeded American Taylor Fritz on Tuesday and moved into a record-extending 48th Grand Slam semi-final.
The 36-year-old came into the match boasting a perfect 8-0 record against the American, and it seemed business as usual as the Serb edged a gruelling first set that lasted 84 minutes in sultry conditions.
Fritz, 26, had two set points on the Djokovic serve in the 12th game but the Serbian countered them and dominated the subsequent tiebreak to take control.
The top seed left the court after the first set and when he returned he suffered the first break of the match. Fritz, who survived eight break points in the opening set, fought off seven more points during the second set to pull level.